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Multichannel Room Correction with Focus Control
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group. Dirac AB, Uppsala.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
2015 (English)In: Journal of The Audio Engineering Society, ISSN 0004-7554, ISSN 1549-4950, Vol. 63, no 1-2, 21-30 p.Article in journal (Refereed) Published
Abstract [en]

Digital equalization of audio systems is mostly performed on a channel-by-channel basis, i.e., loudspeakers are equalized separately and independently of each other. In reverberant rooms the spatial variability of the loudspeaker room transfer function puts a limit on what can be achieved with such single-channel approaches, and considerably more far-reaching results can be obtained with multichannel methods. In this paper we present a multichannel equalizer design method where the loudspeaker to be equalized is assisted by several support loudspeakers that act in combination to improve the response of the main loudspeaker while suppressing the reverberation of the listening room. However, since a full dereverberation may not always be desirable, we shall here study the proposed method from the perspective of how to control the amount of room correction for a given number of contributing support loudspeakers. The amount of correction is controlled by a scalar parameter that we interpret as a "focus control," enabling the user to slide seamlessly between a single-channel equalizer and a full multichannel inversion of the room.

Place, publisher, year, edition, pages
2015. Vol. 63, no 1-2, 21-30 p.
National Category
Other Engineering and Technologies
Identifiers
URN: urn:nbn:se:uu:diva-248653ISI: 000349743200003OAI: oai:DiVA.org:uu-248653DiVA: diva2:802282
Note

Print version: ISSN 1549-4950

Available from: 2015-04-12 Created: 2015-04-06 Last updated: 2017-12-04Bibliographically approved

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Brännmark, Lars-JohanAhlén, Anders

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